.Timeline {
    width: 100%;
    height: 160px;
    font-size: 12px;
    display: flex;
    flex-direction: column;
}

.Timeline>.controls>.IconButton {
    border: none;
    width: 24px;
    height: 24px;
    margin: 0 4px;
    padding: 0;
}

.Timeline>.box {
    position: relative;
    display: flex;
    flex: 1;
    flex-direction: row;
    overflow: auto;
}

/* left */

.Timeline>.box>.left {
    position: sticky;
    left: 0;
    width: 100px;
    background-color: #fff;
    border-right: 1px solid #ddd;
    box-sizing: border-box;
    padding-top: 33px;
    z-index: 10;
}

.Timeline>.box>.left>.info {
    position: relative;
    height: 28px;
    display: flex;
    flex-direction: row;
    align-items: center;
    justify-content: flex-start;
    border-bottom: 1px solid #ddd;
    box-sizing: border-box;
}

.Timeline>.box>.left>.info:first-child {
    border-top: 1px solid #ddd;
}

/* right */

.Timeline>.box>.right {
    position: relative;
    display: flex;
    flex: 1;
    flex-direction: column;
}

.Timeline>.box>.right>.timeline {
    position: absolute;
    height: 32px;
}

.Timeline>.box>.right>.layers {
    position: absolute;
    top: 32px;
    width: 3600px;
    flex: 1;
    border-top: 1px solid #ddd;
    box-sizing: border-box;
}

.Timeline>.box>.right>.layers>.layer {
    position: relative;
    width: 100%;
    height: 28px;
    border-bottom: 1px solid #ddd;
    box-sizing: border-box;
}

.Timeline>.box>.right>.layers>.layer>.item {
    position: absolute;
    left: 0;
    width: 80px;
    height: 100%;
    color: #fff;
    background: #2c3e50;
    box-sizing: border-box;
    display: flex;
    align-items: center;
    justify-content: center;
    border-radius: 2px;
}

.Timeline>.box>.right>.layers>.layer>.item>.smaller {
    transform: scale(0.9);
}

.Timeline>.box>.right>.slider {
    position: absolute;
    left: 0;
    top: 0;
    width: 0;
    height: 100%;
    border: 1px solid red;
    box-sizing: border-box;
}